Weslaco weather by month
What a typical year looks like in Weslaco, Texas: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at WESLACO, 3 km from Weslaco; records cover 1914–2026.
The year at a glance
- Precipitation a year
- 25.7 in654 mm
- Snow a year
- Rare
- Last spring freeze
- Jan 18
- First fall freeze
- Dec 9
- Heating degree days
- 580
- Cooling degree days
- 4,250
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are 36°2° (heating, 99%) and 101°38° (cooling, 1%).
Month by month
Weslaco in January
Highs average 71°22° and lows 50°10°, with 1 in26 mm of precipitation in a typical January.
- Record high
- 93°34° (1971)
- Record low
- 16°−9° (1962)
- Heating degree days
- 187
- Cooling degree days
- 53
Weslaco in February
Highs average 75°24° and lows 54°12°, with 0.95 in24 mm of precipitation in a typical February.
- Record high
- 100°38° (1940)
- Record low
- 20°−7° (2021)
- Heating degree days
- 107
- Cooling degree days
- 91
Weslaco in March
Highs average 81°27° and lows 60°16°, with 1.5 in37 mm of precipitation in a typical March.
- Record high
- 104°40° (1984)
- Record low
- 26°−3° (1917)
- Heating degree days
- 39
- Cooling degree days
- 206
Weslaco in April
Highs average 86°30° and lows 65°18°, with 1.5 in37 mm of precipitation in a typical April.
- Record high
- 110°43° (1920)
- Record low
- 33°1° (1915)
- Heating degree days
- 7
- Cooling degree days
- 328
Weslaco in May
Highs average 90°32° and lows 72°22°, with 2.6 in66 mm of precipitation in a typical May.
- Record high
- 108°42° (2024)
- Record low
- 47°8° (1925)
- Heating degree days
- 0
- Cooling degree days
- 493
Weslaco in June
Highs average 95°35° and lows 76°24°, with 2.8 in71 mm of precipitation in a typical June.
- Record high
- 107°42° (2023)
- Record low
- 53°12° (1930)
- Heating degree days
- 0
- Cooling degree days
- 601
Weslaco in July
Highs average 96°35° and lows 77°25°, with 2.2 in57 mm of precipitation in a typical July.
- Record high
- 108°42° (1939)
- Record low
- 62°17° (1927)
- Heating degree days
- 0
- Cooling degree days
- 654
Weslaco in August
Highs average 97°36° and lows 76°25°, with 1.9 in47 mm of precipitation in a typical August.
- Record high
- 106°41° (1929)
- Record low
- 62°17° (1958)
- Heating degree days
- 0
- Cooling degree days
- 677
Weslaco in September
Highs average 92°33° and lows 73°23°, with 5.6 in143 mm of precipitation in a typical September.
- Record high
- 107°42° (2000)
- Record low
- 48°9° (1942)
- Heating degree days
- 0
- Cooling degree days
- 522
Weslaco in OctoberThis month
Highs average 87°31° and lows 66°19°, with 2.8 in72 mm of precipitation in a typical October.
- Record high
- 104°40° (2012)
- Record low
- 33°1° (1993)
- Heating degree days
- 6
- Cooling degree days
- 366
Weslaco in November
Highs average 80°27° and lows 58°15°, with 1.6 in41 mm of precipitation in a typical November.
- Record high
- 99°37° (1988)
- Record low
- 30°−1° (1938)
- Heating degree days
- 61
- Cooling degree days
- 185
Weslaco in December
Highs average 72°22° and lows 52°11°, with 1.3 in32 mm of precipitation in a typical December.
- Record high
- 94°34° (1939)
- Record low
- 16°−9° (1989)
- Heating degree days
- 173
- Cooling degree days
- 74